Hi Kaergaard,
6, 8, 10 is the best combo to do all winds in Perth. A lot depends on the season we get, if it's a windy one, you'll use all of them, if it's lame like last year, jus the 10 and 8. A 7 and 9 combo works too but depends much on our season.
General consensus is that this season will be a windy one, ...... if it ever gets started

DM